We thank Dr. Leib for his interest in our study and the list of factors that he feels may confound the direct comparison of the 2 treatments for the SIS: corticosteroid injection and MPT. We appreciate the opportunity to address each of these comments.

First, as stated in our article, 1 limitation is the lack of consensus on diagnostic criteria for this condition. To study a homogeneous group of patients, we enrolled those with similar presentations and functional limitations—thus, the inclusion criteria. What Dr. Leib suggests for evaluation is exactly what was done. As part of the assessment during treatment, the treating physical therapists certainly addressed all of the factors that Dr. Leib mentioned (for example, stiffness and irritability to pressure). The assessment was not a pathoanatomical-directed evaluation or -intervention but rather an impairment-based model predicated on the previously stated criteria.